Determination of twelve elements in botanical samples with inductively coupled plasma atomic emission spectrometry after leaching with tetramethylammonium hydroxide and ethylenediaminetetraacetic acid

Uchida, Tetsuo; Isoyama, Hirofumi; Yamada, Kyoko; Oguchi, Kyoko; Nakagawa, Genkichi; Sugie, Hiroshi; Iida, Chûzô

doi:10.1016/0003-2670(92)85355-a

Cited by 37 publications

(21 citation statements)

References 7 publications

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“…[7][8][9] It is well known that the addition of EDTA improves element recoveries in 16 Uchida et al 8 recommended the use of the EDTA diammonium salt, but this form was unavailable from the major chemical supplies. EDTA disodium salt and EDTA as acid were readily obtained.…”

Section: The Use Of Ammoniacal Edta Solution As Extractor Agentmentioning

confidence: 99%

“…Tetramethylammonium hydroxide (TMAH) is extensively used for this purpose, mainly for the digestion of biological and botanical samples. [6][7][8][9] TMAH associated with ethylenediaminetetraacetic acid (EDTA) has also been studied for the alkaline digestion of botanical samples. The addition of EDTA improved the element recoveries in the digest supernatant, considering the excellent ability of this complexing agent to form complexes with many elements.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of metal ions in rice samples: extraction and direct determination by ICP OES

Oliveira¹,

Baccan²,

Cadore³

2012

J. Braz. Chem. Soc.

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Foi desenvolvido um método de extração de íons de metais presentes em amostras de arroz, usando solução amoniacal de EDTA (ácido etilenodiamino tetraacético), pH ≥ 10, como agente extrator, sob as seguintes condições otimizadas: 0,20 g de amostra de arroz e 5,00 mL da solução amoniacal de EDTA, com 5 min de tempo de exposição em ultrassom. Usando condições robustas de ICP OES (espectrometria de emissão atômica por plasma acoplado indutivamente), foi possível analisar a solução extraída, obtendo-se valores de recuperação acima de 90% para a maioria dos elementos estudados (P, K, Mg, Ca, Zn, Mn, Cu e Mo) com RSD < 5%. Os resultados mostraram concordância com aqueles obtidos por extração assistida por microondas e para o material de referência certificado de farinha de arroz (NIST SRM 1568a). Os limites de detecção do método ficaram no intervalo de 0,007 mg kg -1 (Mn) -48,68 mg kg -1 (K), mostrando uma detectabilidade adequada para a determinação das espécies de interesse. A análise das diversas amostras indicou que o arroz brasileiro integral contém teores mais elevados dos constituintes estudados, seguido pelo arroz parboilizado e o arroz agulhinha.A method for extraction of metal ions present in rice samples using ammoniacal EDTA solution, pH ≥ 10, as extractor agent is proposed under the following optimized conditions: 0.20 g of rice sample and 5.00 mL of ammoniacal EDTA (ethylenediaminetetraacetic acid) solution, with 5 min of ultrasound exposure time. Using robust ICP OES (inductively coupled plasma atomic emission spectrometry) conditions, direct analysis of the extraction solution was allowed, and the recovery values obtained were above 90% for most of the studied elements (P, K, Mg, Ca, Zn, Mn, Cu and Mo) with RSD < 5%. The results were in good agreement with those obtained by microwaveassisted extraction and for the reference material of rice flour (NIST SRM 1568a). The limits of detection of method were in the range of 0.007 mg kg -1 (Mn) -48.68 mg kg -1 (K), showing adequate detectability for the determination of the analytes. The analysis of different samples indicated that Brazilian "integral" rice contains higher contents of the constituents studied, followed by "parboiled" rice, and the "agulhinha" rice a long and thin grain type. Keywords: rice samples, ethylenediaminetetraacetic acid, elemental determination, ICP OES IntroductionRice (Oryza sativa L.), actually represents one of the most important foodstuffs in the world; it is the basic dietary product for more than a thousand millions of human beings. Approximately 90% of rice produced in all the world is cultivated and consumed at the Asia. However, the Latin America occupies the second place in production and the third place in relation of rice consumption. Within this context, Brazil is considered one of the biggest rice manufacturer, and its consumption is estimated about 74-76 kg per habitant per year.1 Despite of great national consume, the knowledge about Brazilian rice nutritional composition, taking into account the identification of in...

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Section: The Use Of Ammoniacal Edta Solution As Extractor Agentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of metal ions in rice samples: extraction and direct determination by ICP OES

Oliveira¹,

Baccan²,

Cadore³

2012

J. Braz. Chem. Soc.

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“…4 mL of 5% tetra-methyl ammonium hydroxide (TMAH) solution was added to 0.5-1g of powdered sample in a Teflon vessel for the microwave digestion (Uchida et a., 1992;Zhou et al, 1996;Hamada et al, 1999). The power level and time for each digestion stage were programmed to reach a maximum value of 800 W over 15 minutes, and held there for an additional 10 minutes.…”

Section: Iodine Analysesmentioning

confidence: 99%

Hydrologic Resources Management Program and Underground Test Area Project FY 2001-2002 Progress Report

Rose¹,

Kersting²,

Harris³

et al. 2003

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“…4 mL of 5% tetra-methyl ammonium hydroxide (TMAH) solution was added to 0.5-1g of powdered sample in a Teflon vessel for the microwave digestion [7][8][9] . The power level and time for each digestion stage were programmed to reach a maximum value of 800 W over 15 minutes, and held there for an additional 10 minutes.…”

Section: Introductionmentioning

confidence: 99%

Distribution of 99Tc and 129I in the vicinity of underground nuclear tests at the Nevada Test Site

Zhao

Rose

et al. 2008

J Radioanal Nucl Chem

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99 Tc and 129 I are important contributors to risk assessment due to their long halflives and high mobility as aqueous anionic species. We analyzed 99 Tc and 129 I in groundwater samples in and near 11 underground nuclear tests and in melt glass and rock samples retrieved from the Chancellor test cavity, Nevada Test Site. The 129 I/ 127 I ratio ranges from 10 -3 to 10 -6 in cavity water and 10 -4 to 10 -9 in satellite wells. The 99 Tc concentration ranges from 3 to 10 -4 Bq/L in cavity waters and from 0.3 to 10 -4 Bq/L in satellite wells. Downstream migration is apparent for both radionuclides. However, it is affected by both retardation and initial distribution. In-situ 99 Tc and 129 I K d s calculated using rubble and water concentrations are 3 to 22 mL/g and 0 to 0.12 mL/g, respectively and are suggestive of mildly reducing conditions. 129 I distribution in the melt glass, rubble and groundwater of the Chancellor test cavity is 28%, 24% and 48%, respectively; for 99 Tc, it is 65%, 35% and 0.3%, respectively. Our partitioning estimates differ from those of underground tests in French Polynesia, implying that fission product distribution may vary from test to test. Factors that may influence this distribution include geologic conditions (e.g. lithology, water and CO 2 content) and the cooling history of the test cavity.

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Determination of twelve elements in botanical samples with inductively coupled plasma atomic emission spectrometry after leaching with tetramethylammonium hydroxide and ethylenediaminetetraacetic acid

Cited by 37 publications

References 7 publications

Evaluation of metal ions in rice samples: extraction and direct determination by ICP OES

Evaluation of metal ions in rice samples: extraction and direct determination by ICP OES

Hydrologic Resources Management Program and Underground Test Area Project FY 2001-2002 Progress Report

Distribution of 99Tc and 129I in the vicinity of underground nuclear tests at the Nevada Test Site

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